AT6101DR/1 Spectrometer

AT6101DR/1 Multifunction portable spectrometer is designed for radiation monitoring of water, agricultural produce, seafood, raw material and other material without prior sampling and sample preparation. Measurements are made in 4π geometry by spectrometer's detection device places in the controlled material.
Spectrometer capabilities:
  • Identification of 134Cs, 137Cs, 40K radionuclides
  • Measurement of 134Cs, 137Cs, 40K radionuclides specific activity
  • Measurement of ambient gamma radiation dose equivalent rate
The unit has scintillation detector with NaI (Tl) crystal Ø63x160mm size inside lead protection. The unit automatically checks sample radionuclide content during sample radiometric radionuclide monitoring. The identification results are used for sample radionuclides activity calculation. Gamma ray instrument spectra are processed in software.
All measurements and processing results are displayed on PC monitor in real-time.

Gamma radiation detector

Scintillator, NaI(Tl) Ø63x160 mm

Registered gamma radiation energy range

50 keV ... 3 MeV

Specific activity measurement range for 4π measurement geometry:



10 ... 1·105 Bq/kg


10 ... 1·105 Bq/kg


150 ... 1·104 Bq/kg

Intrinsic relative error of 134Cs, 137Cs and 40K specific activity measurement

±20% max.

Ambient gamma radiation dose equivalent rate measuring range

0.01 ... 50 µSv/h

Intrinsic relative error of ambient dose equivalent rate measurement

±20% max.

Energy dependence relative to 662 keV (137Cs)

±20% max.

Sensitivity to 137Cs gamma radiation

4750 cps/µSv·h-1

Typical resolution at 662 keV (137Cs)

9.5% max.

Maximum input statistical load

5·104 s-1

Number of ADC channels


Operation mode setup time

1 min

Integral nonlinearity

1% max.

Continuous run time in normal conditions

9 h

Measurement instability during continuous service

1% max.

Working temperature range

-20°C ... +50°C

Relative air humidity with temperature ≤35°C without condensation

95 %

Protection class



GPS-receiver, integrated into HPC. Positioning accuracy ≥ 3 m

Connection to PC


Overall dimensions, weight


Hand-held PC

100x250x60 mm, 0.5 kg

Detection unit

125x140x625 mm, 7 kg

Design and specifications are subject to change without notice

Download brochure348.81 KB